Pressure-reducing valve.



F. NIGOLA.

PRESSURE BEDUUING VALVE.

APPLICATION mum 11.12. 1909.

923,568. Patented June 1,1909.

WITNESSES I INVENTOR m J'dzleria Ji'cala 1 av ATTORHE Y3 UNITED STATESPATENT OFFICE; ritrsnn'ro Nicolai, or vonK, N.r. PanasonicnnocentsVALVE. i

Specification Letters Patent.

Application filed April 12, 1909'.

Patented June 1, 1909.

Serial No. 489,396.

T 0 all whom it may concern:

Be it known that I, FrLmEn'ro NICOLA, a citizen of the United States,and a resident of the city of New York, borough of Brooklyn,

in the county of Kings and State of New.

York, have invented a new and Improved PressureFReducing Valve, of whichthe following is a full, clear, and exact description.

This invention relates to valves adapted for reducing the ressure of amotive agent as it is utilized or useful effect, and more particularlyto reduce the pressure of water owing from high pressure serviceconduits, to hose or the like for extinguishing fires or for otherpurposes that re uire a controlled uniform ressure of fluid or iquidwhere used.

The object of my invention is to provide novel, simple details ofconstruction for a pressure reducing valve, that afford a practical,inex ensive device of the character indicated, which is generally a.plicable for use in control-1' the pressure 0 water, steam or gas as itis dlstributed to a point for use from a source of high pressure supply.

The invention consists in the novel construction and combination ofparts, as is hereinafter described and defined in the appended claims.

Reference is to be had to the accompanying drawing and to the charactersof reference thereon, the single figure shown representing alongitudinal sectional view of the improved valve.

The device is shown as introduced between st; high pressure waterconduit 10, that appears at the right in the drawing, and a reducedpressure service main 11, that is shown at the left-in said view. Thevalve shell 12, that is a detail of the ,invention, may be 4 joined withthe conduit 10 and service main 11 by flanges a, mother preferred means,and consists of the following details; A eoncavo-convex wall 12 formsthe lower side of the shell 12, and directly above the wail. 12,

a-circular o 'ening b is produced in a diaphragm 13, rom which depends atransverse partition 13, that integral with a cylin- 'dricahguidewall14, which is joined with the concavomonvex wall 12 at-its side that is0, nearest to the highpressure'conduit 10. The ripper edged) of thediaphragm 13 is beveled andafiierds a valve seat, and concentric withsaitl vavleseat and equallys aced therefrom,

z; addme-like topnvall-12 is ormed integrally with the diaphragm 13 andother portions of the shell 12'.

From the dome top 12", a cylindrical wall or valve case 15 is upwardlyextended, which is an integral portion of the guide Wall 14 and isaxially coincident therewith; The wall 15 is extended down and connectswith the diaphragm 13, as is indicated at 15*, and openings 0 are formedtherein at intervals, as shown by dotted lines. A cylindrical valve isprovided, which comprises two integral portions 16, 16", that areconcentric or have a common axis. The upper portion L6 of the valve isof a diameter that ads. 7 ts it to slide freely but liquid-tight in theva vc case 15, and to insure against leakn ei, a packing ring cl isfitted into a peripl ieral groove in said ortion 16 of the valve andcontacts with t e, true inner suriace' oi' the valve case 15. The lowerportion 16".ofthe valve body is slidably fitted inl t-he ring-like guidewal tact with the valve body and case, thus adapting the lower portion16 of the valve body to form a closure between thcrhigh pressure orreceiving end ofth e :valve shell and the opposite end thereof. Thereis-a radial shoulder f formed between then per portion 16 and the lowerportionlfi the valve body and thd outer corner of this shoulder isbeveled, thus adaptin it to have liquid-tight engagement with thebeveled valve seat 6. j

The valve body is centrally chambered from its lower end toward the 11per end thereof to lighten it, and the heig t ofqthic upper portion 16from the valve seat when imposed thereon, is such thatia space; isafforded above the valve in the case 16 which is closed by a coverplatel fib Upon the portion of the valve shell;12, that is attached tothe scl'vicernain 11 at "the left in the drawing, an upright valveeasel-'7 is formed, having a true cylindrical bore therein, and in saidbore a controller-valve 18 is fitted, that is rendered water ti ht by apacking joint ring 9 that is embedded 111a roove in the periphery of thevalve body. radial fian e h is formed on the upper end of the controllervalve 18, which when seated on a similar flange '5 formed on the valvecase 14 and a packing ring 6 that is embedded in the valve haswatentight chin 17, limits the downward movement of said hei' ht,whereon a HOYKB bar 20 is mounted on secured. Aco ed meal ame two spring21 is centrally a] no 'below and near the port 0.

seated on the upper end of the controller valve. 18, and upons'aidspring a pressure plate 21' is mounted, which atits center receives thelower'end of an adjusting screw 22, that has-athreaded engagement with acentral threaded perforationm theyokebar 20, said screw being controlledby a hand wheel 22 that issecured on the upper end thereof.

The controller valve -18 is prevented from tu on its axis, by a sphnej mthat pro- 1ectst er'efrom into loose engagement within a vertical groo en formed in the side wall ofthe valve oas 17.

In the cylindrical body of the valve case 17, as shown at the left inhorizontal, but the upper wall thereof is s10 ed upward, so as to giveproper vertical wi thto said passa e at its right hand end.

In the side wall 0 the valve case 17, opposite the widest end of thetransverse passage r two spaced narrow ports .9, s are formed in thesame vertical plane. A-bent pipe 24 is secured by its lower endover theupper port 8 in the side wall of the valve case 17, and

thence extends upward and laterally, so-as to locate the other endthereof in engagement with the cover 15 on the valve case 15 overanopening t therein. Over the lower port 8 inthe valve case 17 one endof a bent pipe 25 is seated and secured, and the lower end of said. 'ipethat seats upon the upper side of the va ve shell 12 over an opening ittherein, is secured thereto by any suitable means.

As shown, the relative dpositions of the 'ports .9, s, and port 0, anthe vertical di- ,mensions of the passage rat the right hand endthereof, are such that when the controller valve '18 is seated upon theflange i at the u or end of the case 17, the ports 8, s, w be put intocommunication with each other by a disposal of the wider end of thepassa e r opposite said ports. This will aflor a direct passage forliquid through the bent pipes 25 and 24, from the left end of the valvechamber 12 into the chamber above the main valve 16. At this time thenarrow end of the passage r is disposed below and near the port 0, sothat the left hand end of the by-pass pipe 23 is sealed.

ikssuming that the arts of the device are adjustedas shown, t eoperation is as follows: The controller valve 18 is by an adjustme'nt'ofthe screw 22 and spring 21, loaded to afford a desired pressure orliquid ceases passing into the ipe 11 at the left end of the reducing vavs The initial pressure of the liquid fed from the conduit 10 Into thevalve chamber 12, will lift the valve 16, and water or the liquid passininto the reducing valve will pass throu the openings 0 into the lefthand end of t e valve chamber 12. As: the initial pressure of the liquidthus introduced below the controller valve is greater than the load onsaid valve, it will rise in the casing 17 and close the lower port 8',said elevation of the valve 18 disposing the narrow end of the passage1' there- In in registry with the left handend of the by-pass pipe 23.As the upper port s in the case 17, is still in open communication withthe widest end of the transverse passa e 1', it will be seen that theinitial pressure 0 the liquid from the conduit 10 will be transferred tothe chamber above the main valve 16. The area of the upper end of thevalve 16 being greater than thatof the annular shoulder and the beveledface on said valve, this imposed pressure on the valve 16 willcorrespondin 1y depress it and re- 'duce the volume of iquid passingthrough the ports 0. a

It will be understood that the reduction in pressure had by the liquidassing into the left endportion of the va ve chamber 12, will correspondwiththe load on the controller valve 18.

' Obviously an variation in the initial ressure of the liquid passedinto the reducingtvalve from the conduit 10, will be automaticallyreduced to a continuous pressure that is exactly regulated by the springpres-: sure on the controller valve.

Having thus described my invention, I, claim as new and desire to secureby Letters Patent:

1. A pressure reducing valve, embed in a main valve and a controllingvalve, ot s'lidable in casings that are branch extensions from the shellof the reducin valve, a spring-pressed device engaging t e upper end ofthe controlling valve, orts in the main valve casing for transferringfluid underinitial pressure into the shell below the controllin valve,so as to lift the controlling valve, an means controlled by theliftincgl of the cdntrolling valve for transferring flui under initialpressure through the controlling valve and into engagement with theupper surface of the main valve, so as to press said valve for thecontrol "of fluid passing below it in accord with the spring pressure onthe controlling valve.

2. The combination with a; high pressure fluid conduit and a reducedpressure pipe, of a pressure reducin valve, embodylng a shell, a mainvalve s 'dablein an upright extension from the shell, a controllin v veslidable in a branch casing extende from the shell at the side of theother valve, 9.

pressure regulating spring seated on the con trolling valve, said valvehaving a. transverse pessage therein wider at one end then at the otherend, the casing for the controlling valve having a. port therein thatmay register with the narrow end of the passage, this casing also havingtwo spaced ports formed opposite the single port therein, two bent pipesthat respectively connect the upper port with a. chamber in the mainvalve casing above the majnvalve, and the lower port with the reducingvalve shell near the controller valve, and a by-pass pipeconmeeting thesingle port that registers with the narrow end of the trensverse passage15 with an opening'in the reducing valve shell near the high pressureconduit.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FILIBERTO NICOLA.

Witnesses:

GIACOMO PROVERE, GIACOMO ZURDITI.

